diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 540e2ab..48c6c75 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,8 @@
 name: CI
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
 
 env:
   ZINNIA_VERSION: v0.20.2